Metallic packing



J. T. CRANE PACKING Filed May 15. 1920 FIG. 6

INVENTOR v JOHN T. CRANE ww,

Patented Aug. 28, 1923.

pa rs ra'ras JOHN T. CRANE, 3F MAYX VOOD, ILLINOIS), ASSIGNOR T9 CHICAGO METALLIC PfiCKING- i 00., 013 CHICAGO, ILLINDIS, A. CORPORATION'DF ILLINOIS.

PACKING.

Application filed ma 15,1920, Serial no. 381,638.

To all whom it may concern:

Be it known that I, Jena: 1. Crane, citizen .of ti United States residlngwat" Maywood, in the county of Cook and Etate of Illinois, have invented'a new and useful lniprovementin Packings, of which the fol-" lowing is a specification.

Mypresent invention relates to improve ments in packing and has special reference to the provision of a packing which will be peculiarly suitable for use with piston rods which are out of line, or which have-been worn to such an extent as to have developed a shoulder or shoulders, or which-are sub 'Fvrni-ch will keep the packing yielding in con I am aware that rubber and other resilient cores have been employed tact with the rod.

in packing for the purpose of securing elasticity in the resulting packing, but when such resilient material is located wholly within the body of the packing and'surrounded with non-resilient compressible material the elasticity thereof is materially deadened and rendered ineffective.

My present invention consists in employing rubber or other suitable.elasticjmaterial' together with flexible metal, such as is shown and described in my above-mentioned Letters Patent, and disposing these respec- I tive elements so that the metal will be adjacent to and invcontact with the moving surface, and the elastic element will be disposed between the flexible metal and the her so as to continually and yieldingly press the metal towards the moving surface while at the same, time the elastic material will be wholly protected by the metal from the friction with and abrasion by the moving surface, and will also be protectedfrom the action of the vapors or fluids which may be brought into contact with the packing by the moving surface.

gAround the elements appreciable extent. 1 that elastic element 11. instead of being non-compressible wall of the packing chamy I. prefer to attain the above mentioned objects by the design and arrangement of the elements as iliustrated panying drzr ings forming 2e fication in which TDIQUIO It is an elevation of my a part of this improved packin drawn to an enlarged scale,

1 ure 2 is an end elevation or cross sec- F'g tion of the structure shown in Figure 1.

1gures3, 1-, 5 and 6 are end elevations or cross sections showing different arrangernentsof the elastic and flexible metal elements with th exterior braiding removed.

In the dawlngs, I have employed the same reference characters to designate simidrawings, the elastic element 11 has a rec' ,tangular exteriorsectional contour of a size slightly smaller than is desired for the completed packing one face of the elastic ele ment beingprovided with a channel 12 of round or cylindrical section/to receive the flexible metallic element 10 which is placed adjacentthe movinggsurface to be packed. elements thus disposed is braided a retaining fabric '13 to hold the in the arrangement described. The retaining fabric is braided preferably from bundles of soft line or thread-like cop per wires, as seen in detail in Figure 1 of the drawings. This containing fabric being formed of soft fine copper wire is easily and quickly compacted and does not absorb the elasticity of the elastic element to any Itv will now be seen wholly surrounded by compressible butnonelastic substances as is the case when it is disposed in the center of'packing, has the in the accomv opportunity to press the flexible metallic element yieldingly towards the moving surface, and thatlits elastic quality is exerted wholly against the flexible metallic element, the backing of the elastic element being the non-compressible walls of the gland 01' packing chamber or stuffing box in which the packing is placed.

It Will also be seen that the rlcnible metallic element Will protect the but is given a triangular ection, and the flexible n ietallio element is formed With a channel 15 to accommodate the elastic element. 7

In Figi'ire 5 the elastic element is also dis posed on the back of the packing and is given a rectangular section.

in Figure 6 the elastic element has a flat rear face the edges being concavely molded as at 16, 16, thereby extending the central portion 17 of the elastic element Well into the body of the packing. In this modification, the flexible metallic element fills out the channels formed by the concave molding of the elastic element.

All of these forms have special desirable features for particular situations, but they are all similar in that the packing may be made continuous in any desired length; that it can be easily bent for insertion into a packing chamber of any curvature or diameter; that the full elasticity of the elastic element is realized for yieldingly pressing the metallic element against the moving surface; and that the elastic element is covered and protected by the metallic element.

The drawings are, in a sense, merely dia grainmatic for the purpose of illustrations, and I have shown but a few modifications in which my improved packing may be fabricated. It will be obvious to others skilled 'ria in this art that divers other modifications may be made Without materially departing from the principle I have disclosed. Therefore, I desire it understood that all such modifications or changes are contemplated Within the scope of the append d claims.

.lVhat I claim is 1.2L packing consisting of metal foil formed in suitable cross-sectional dimensions, a cushion of resilient material contiguous thereto, and a casing of braided matel enclosing the same. 2. A packing consisting of metal foil formed in suitable cross-sectional dimens a rubber cushion contiguous thereto, a

nd a casing of braided material enclosing the same. 7

' A packing consisting of metal foil I. v a L A 11 V. 1 Clll'lhl tl together and loinied in suitaoe cross-sectional dimensions, a cushion 01" resilient material contiguous thereto, and a using of braided material enclosing the packing consisting of metal foil d together and formed in suitable cross-sectional dimensions. a rubber cushion contiguous thereto, and a casing of braided material enclosing the same.

5. A packing consisting of strips of metal .toil coated with graphite and oil and crinkled together and pressed into desired form, a cushion ct rubber contiguous thereto, and casing therefor formed of braided bundles of copper Wire.

6. A packing comprising a backing of rubber, and a facing of crinkled metal foil. the same being surrounded by a braiding of copper Wire, .Whereby the metal is presented yieldingly to moving surface.

Signed at Chicago, county of Cook and State "of Illinois, this 13th day of May, .920.

JOHN T. CRANE.

Witnesses:

K. Lease, Jr, l nonnnon MIT HELL. 

